Before the Founders wrote the Constitution, it was only theory and no proof.
Heinleinland and Randovia are not real places but mental exercises in sheer and utter kookery. They make fine fiction because that is exactly what they are. Most libertarians that I know are radical ideologues who would destroy the country to refashion it in "anything goes but traditional values" image. That makes them the opposite of conservatives.
(Still, I do applaud you personally for trying to distance yourself from the ACLU.)